This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A084522 #8 Jul 29 2017 13:05:47 %S A084522 3,42,441,522,531,4440,4530,5241,5340,5511,5520,6222,6231,6312,6330, %T A084522 6411,6420,45501,46131,46401,52440,52530,53502,55140,55500,56112, %U A084522 56130,56202,56400,62241,62340,62511,62520,63141,63501,64140,64500,66111 %N A084522 Successively larger 3-ball 'prime' ground-state site swaps of A084521 in concatenated decimal notation. %C A084522 Note that this decimal representation works only up to the A084520(A084527(10))-1 = 1919th term which is 99600000, after which follows the 1920th solution 10,2,2,2,2,2,2,2 which would be usually represented as "A2222222". %H A084522 A. Karttunen, <a href="/A084507/a084507.scm.txt">Scheme-program for computing this sequence</a> %H A084522 <a href="/index/J#Juggling">Index entries for sequences related to juggling</a> %Y A084522 The number of terms of length n is given by A084529. Subset of A084512. %K A084522 nonn,fini,base %O A084522 1,1 %A A084522 _Antti Karttunen_, Jun 02 2003